成年累月

chéngniánlěiyuè
year in, year out (idiom)

CEDICT

over many years and months; year in, year out

Wiktionary

年复一年，月复一月。形容长时间。

重編國語辭典

年复一年，月复一月，形容长时间

維基詞典

Entry Composition

1 成年 chéngnián
  1. to grow to adulthood
  2. fully grown; adult
  3. the whole year
2 累 lěi
  1. to accumulate
  2. to involve or implicate (Taiwan pr. lèi)
  3. continuous
  4. repeated
3 月 yuè
  1. moon
  2. month
  3. monthly

classifiers: 個, 輪

Related entries

积年累月 jīniánlěiyuè
  1. year in, year out (idiom)
  2. (over) many years
长年累月 chángniánlěiyuè
  1. year in, year out (idiom)
  2. (over) many years
长年累月东奔西走忙死了，生活太没有规律了。

I'm so busy running about year in, year out. My life has no consistency.

Source: Tatoeba

整年累月 zhěngniánlěiyuè
  1. month after month, year after year
  2. year in, year out